Computers aren't smart or dumb, they do what they're told. When I married, I was unable to list my last name as "Bueno Vasquez" without using a hyphen or combining the two names together. Names like De La Rosa have similar issues. Finally the clerk set my birth last name to my middle name.
I neglected to change my Social Security card, so when the University began its email system, it only used the names associated with SSNs. The policy was set in stone for some five years, when it became clear that a great many people had issues with name displays.